Calaveras Big Trees State Park is located in the Sierra Nevada mountains of California. It is famous for its giant sequoia trees, some of which are over 3,000 years old. The park covers approximately 6,000 acres and offers various recreational activities, including hiking, camping, and wildlife viewing. Visitors can explore several trails, including the popular North Grove Trail, which features a scenic loop through the towering sequoias. The park also has picnic areas and educational programs to help guests learn about the unique ecosystem and history of the area.